Field Test for Paint Integrity
Original Publication Date: 1985-May-01
Included in the Prior Art Database: 2005-Feb-18
A non-destructive, in situ test to measure the adhesive strength of reflective paint used on RF antenna surfaces is described in the following process. An aluminum stud 1, made from a one-inch diameter bar, is cut to a ¼ inch length. The top 3/8 inch is milled into a hexagon, 3/4 inch across flats (Fig. 1). The stud 1 is then adhesively bonded to the edge of an antenna 2 (Fig. 2). After the adhesive is cured, the bond strength of the reflective paint surface is tested via an application of a known force with a standard torque wrench. Upon failure, the exact force is determined and is compared to values generated on known good antennae. To ensure that only the paint and its associated bond strength are tested, any fillets of adhesive that are formed between the stud and the antenna surface must be scribed or cut away.